. >> romney's running mate paul ryan also questioned whether white house officials are on the same page. the administration has called the libya violence a terrorist attack but yesterday president obama used different terms to describe what happened. >> we are still doing an investigation. there is no doubt that the kind of weapons that were used, the ongoing assault that it wasn't just a mob action. >> a white house security advisor denies allegations of a coverup and says they are investigating exactly what happened to insure the safety of diplomats. >>> time now 5:12. many world leaders say they will wac out of the u.n. general assembly today as iran's president takes the stage. alison burns. >> reporter: macmoodahmadinejad seems to be -- he is calling for a new order to replace what he calls the era of bullying by the u.s.. iran has become a central focus in the u.s. presidential race with mitt romney demanding a stronger response to iran's defiance. >> crippling sanctions, indicting ahmadinejad for incitation to genocide. treating the diplomats of iran. >> reporter: president obama